Valve



E. A. NASLUND.

VALVE.

APPLICATION FILED IUIIE 23, I9I3.

Patented Auf. 22, 1916.

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ERIC A. NASLUND, OF DUNKIRK, NEW YORK.

VALVE.

Specification of Letters Patent.

Patented Aug. 22, 1916.

Application led .T une 23, 1913. Serial No'. 775,310.

To all 'whom t may concern.'

Be it known that I, ERIC A. NASLUND', a citizen of the United States,residing at Dunkirk, in the county of Chautauqua and State of New York,have invented certain new and useful Improvements in Valves, of whichthe following is a specilication.

This invention relates to improvements in valves, particularly adaptedfor use in water tanks stationedV along railway tracks for supplyingwater to locomotives.

y invention has for its object the production of a valve in whichprovision is made to prevent leakage past the valve proper'when grit orany foreign substance lodges thereon and also to so construct the valvewith a view of increasing its durabilit yTo these ends the inventionconsists in the' novel features of construction and in the arragementand combination of parts to be hereinafter described and particularlypointed out in the subjoined claims.

In the drawings in which like numerals of reference refer to like partsin the several figures, Figure 1 is a vertical section of a water tankequipped with my invention. Fig. 2 is a vertical section through myimproved valve and parts to which it is connected. Fig. 3 is an enlargedvertical section of the lowermportion of the valve, the

valve proper beingl in a different positionthan shown in Fig. 2. Fig.l'is a cross section taken on line c-a, Fig. 2.

The reference numeral 5 designates a water tank having an outlet-pipe 6andan inlet or supply pipe 7 to which my im proved valve 8 is secured.Said valve has a valve casing 9 which comprises three parts lO, 11, 12,but which may be otherwise constructed, if desired. The upper part 10 isa short length of pipe threaded at its lower end into theintermediatepart 11 which is a pipe T-Iitting having its lateral branch13 connected to a lateral branch 14 ofthe inlet or supply pipe 7. Thelower partf12 of said casing has its upper end threaded into the lowerend of said intermediate part; it having a cylindricalupper portion 15and a downwardlyflaring` lower portion 16. The part 10 may be termed theequalizing chamber, the part 11 the inlet member, and the part 12 theoutlet member.

At the point where the cylindrical upper end of the outlet member meetstheJ flaring lower portion, an offset or shoulder 17 is formed whichalso liares downwardly at a greater angle than said flared lowerportion, serving as a valve-seat for a valve 18 movable between aplurality of longitudinallydisposed guide-webs 19 extending inward fromthe flaring wall of the said lower portion, the inner guide edges 2O ofsaid webs being parallel and the valve 18 moving in contact therewith.Said webs are separated by intervening spaces 21 which serve as waterpassages and by reason of said webs being gradually widened from top tobottom, said water passages are correspondingly enlarged downwardly.This arrangement allows free escape of water through the valveandeliminates all pounding.

- Valve 18 closes against the water pressure and is secured to a rod 22having its upper end projecting beyond the upper end of the valve casingfor connection with a float lever 23 pivotally secured at one end `to anarm or extension 24 rising from the inlet or supply-pipe 7 and having afloat 25 at its opposite end. The connection of the valve rod 22 to saidfloat lever is such as to let said valve rod travel in a true verticalplane, and for this purpose said lever is provided with a longitudinalslot through which and the upper end of said valve rod a pivot 27 ispassed. Secured to said valve rod at a point within the equalizingchamber is an equalizing plunger 28 which may be of any approvedconstruction, it being adapted to equalize the pressure of the water asit enters the valve casing. l

f jWith a. view of preventing grit or other foreign matter lodgingbetween the valve and thevalve-seat and alsoy to relieve the seatingmember ofthe valve fromV pressure I have provided thenovel constructonof valve to vbe now described, which in conjunction I'with the novelconstruction of valve-seat associated with the water passage 21 willmost effectively producethe desired results. Said valve comprises two.metallic or other rigid members 28, 29 which are secured to the valverod 22 in any suitable manner, but by preference are threaded onto saidvalve rod, which is reduced at its lower end to form a shoulder 30against which the upper member 28 bears, both members being retained onsaid rod by a nut 3l threaded thereon and bearing against the lower faceof the lower member 29. Valve members 28, 29 are separated by a centralhub or boss 32 formed on one member and in the space thus provided isclamped a seating member 33 of rubber or any other suitable material.

Lower member 29 and seating member 33 are of like diameter and havetheir edges in contact with the guide webs'19 while upper member 28 isof somewhat smaller diameter so as to snugly but slidably enter thecylindrical upper portion of the outlet member of the valve casing.

1t is to be noted that the seating member 33 of the valve comes incontact with the valve-seat 17 at its greatest diameter, and as saidseating member is preferably yielding, it acts to positively shut ofithe supply of water to the tank. By reason of the valve-seat 17 beingmade flaring, the wearing of the seating member of said valve will onlyresult in its coming in contact with said valve-seat at a point ofsmaller diameter, but assurance will always be had of an absoluteclosure against the 'flow of Water through the valve casing.

An important feature of my invention is that the upper member 28 of thevalve servesas an initial shut-od or closure member since it isconstructed to enter the cylindrical upper end or neck of the outletmember of the casing before the seating member is seated, and any gritor other foreign matter will be prevented from reaching the seatingmember, and if of any length or size, will be sheared by said closuremember if part has reached a point below the upper or smaller edge ofthe valve-seat. 1n this manner any grit or other matter lodging on theseating member has an opportunity to become dislodged withoutpossibility of additional grit or foreign matter lodging thereon, sincethe initial closure member, owing to its snug fit in the neck of thecasing for at least part of its depth, will prevent foreign matterreaching the seating member, although water may seep along the edge ofsaid initial closure member and assist in dislodging any grit `orforeign matter thereon. Moreover, said upper member, when partly enteredin the upper cylindrical portion of the outlet member serves to relievethe seating member 33 of the valve from pressure. 1t is highly essentialthat valves of this type should absolutely shutoff the supply of waterto the tank, as in many cases the overflowing of water from the tank,particularly when surmounted on a building, may cause considerabledamage. Moreover, the closing of a valve against its seat with grit orother foreign matter thereon will cause the valve to wear quick andunevenly and 1f worn Vuneven will be a continual source of annoyance dueto leakage.

Having thus described my invention,l

ameters spaced apart and a seating-memberv of larger diameter than thesmaller of said rigid members held between said rigid members, saidvalve closing against the pressure of water passing through said casingand in its closing movement being adapted to cause the smaller rigidmember to at least partly enter the smaller interior portion of saidcasing and the exposed angle of said seating-member to bear against saidvalveseat after the initial entrance movement of said smaller rigidmember into said smaller interior portion of the casing, said smallerrigid member serving as a shearing element to shear foreign matter thatmay lodge within the casing at the point at which said member enters thesmaller interior portion of the casing.

2. The combination of a valve-casing having a cylindrical portion, aflaring outlet portion, a flaring valve seat joining the walls of saidoutlet portion With said cylindrical portion and guide webs in saidflaring outlet portionA extending from the outerV end of the latter tosaid valve seat, said guide webs having parallel guide edges and beingseparated by water passages, a valve rod in said casing, a valve securedto said valve rod and comprising a rigid cylindrical member adapted toenter said `cylindrical portion, a yielding seating member adapted toclose against said valve seat after the initial entrance movement ofsaid rigid cylindrical member i-n the cylindrical portion of saidcasing, and a second rigid member between which and said rst-Inentionedrigid member said seating member is clamped, said second rigid memberand said seating member being of the same diameter and both in contactat their parallel edges with said guide webs and said rst-mentionedcylindrical member serving to relieve said. seating` member of pressurewhen the latter closely approaches its seat.

3. The combination of a valve casing having a cylindrical portion, anenlarged outlet portion and a Haring valve seat joining the walls ofsaid enlarged outlet portion with said cylindrical portion, a valvewithin said casing comprising a rigid cylindrical member adapted toenter said cylindrical portion, a yielding seating member adapted toclose against said valve seat after the initial entrance movement ofsaid rigid cylindrical member into the cylindrical i por- In testimonywhereof I aiiX my signa-ture tion of said casing, and a second rigidmemin presence of two Witnesses. ber between which and saidrst-mentioned rigid member said seating member is ERIC A' NASLUND' 5clamped, said first-mentioned rigid member Witnesses:

serving to relieve said seating member of EMIL NEUHART,

pressure when the letter approaches its seat. J AooB OBERST, Jr.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

